In a solar system over 100 light years from Earth, researchers have spotted one of the building blocks of life-sustaining planets. That building block may not sound like much: just a single asteroid containing a lot of water. But it’s this same type of asteroid that may have brought water to earth when it was first being formed. And this marks the first time that such an asteroid has been detected outside our own solar system — indicating that this far-off realm may once have been home to habitable planets.
via The Verge
